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      08-14-2020, 04:53 PM   #6
akkando
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Drives: 17 M2 DCT LBB,11 e90 M3 ZCP IB
Join Date: Jan 2017
Location: Bay Area

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Quote:
Originally Posted by MattyRice View Post
Quote:
Originally Posted by Richbot View Post
That's how my car has sounded since it was new at certain speeds like 40-50mph, especially on coast-down it's always had a little bit of gear whine.

It has 129,000 miles on it now and the diff has never had any problems. The fluid being brown after 15k is normal.
omg this is normal? fuck
did the previous owner install stiffer diff bushings than stock? you could try fluid change with the additive I'm it that reduces differential chatter. think BMW makes one with SAF-XJ + FM booster but do your own research to make sure you get the right one.